Hmmm, a lot louder doesn't sound too appealing to me. I wonder how it compares to the change in tone/sound achieved with the 2ndry cat deletes. Maybe a resonator downstream would help tone it down without sacrificing the gains.

Hmmm, a lot louder doesn't sound too appealing to me. I wonder how it compares to the change in tone/sound achieved with the 2ndry cat deletes. Maybe a resonator downstream would help tone it down without sacrificing the gains.

I used to have 2 videos of my tts one with the downpipe and one with the catback only. Huge huge difference, I'll try to look for them.

Guys I created a quick decibel post last night. Granted it does not have th DP just yet. I will be installing that on Wednesday next week and provide a decibel reading on the difference. Truly that is the best way to determine how loud it really is.

Inside my car with the SwitchPath system and cat delete pipes under load above 4k RPMs the highest reading with the valves open was 102 Db. With the valves closed under load above 4k RPM it still registered 85-92db inside the vehicle.

We got to keep in mind it's a compact car and there is not alot of space between the engine and the exhaust. Even for a turbo engine this thing makes alot of great sound. Probably one of the louder turbo charged cars out there that come natural from the factor turbocharged.

I will not be doing a turbo back set up. Just a HFC downpipe with the other components. I don't know if this helps, but I will report back with readings next week once HFC is installed.

Guys I created a quick decibel post last night. Granted it does not have th DP just yet. I will be installing that on Wednesday next week and provide a decibel reading on the difference. Truly that is the best way to determine how loud it really is.

Inside my car with the SwitchPath system and cat delete pipes under load above 4k RPMs the highest reading with the valves open was 102 Db. With the valves closed under load above 4k RPM it still registered 85-92db inside the vehicle.

We got to keep in mind it's a compact car and there is not alot of space between the engine and the exhaust. Even for a turbo engine this thing makes alot of great sound. Probably one of the louder turbo charged cars out there that come natural from the factor turbocharged.

I will not be doing a turbo back set up. Just a HFC downpipe with the other components. I don't know if this helps, but I will report back with readings next week once HFC is installed.

I am interested in this too. My TT is my wife's dd, and I don't want it to be much louder, but I do want it to be faster for my weekend spirited driving.

It seems that the videos posted above has aftermarket exhaust as well as the dp. I could be wrong, but I am just not aware of a tts being so loud from Audi, I apologies if I am wrong.

Looking forward to hearing any input of a dp added to a TT with factory exhaust. I too am looking to go with the apr 3" dp, and stg II flash. Just bought the car a few weeks ago, so its stock, but flashing it this week.

I am interested in this too. My TT is my wife's dd, and I don't want it to be much louder, but I do want it to be faster for my weekend spirited driving.

It seems that the videos posted above has aftermarket exhaust as well as the dp. I could be wrong, but I am just not aware of a tts being so loud from Audi, I apologies if I am wrong.

Looking forward to hearing any input of a dp added to a TT with factory exhaust. I too am looking to go with the apr 3" dp, and stg II flash. Just bought the car a few weeks ago, so its stock, but flashing it this week.

If its your wife's I'd go with the flash only for now. Trust me downpipe makes thing different IMO I don't think she'll enjoy it as a dd.

I am interested in this too. My TT is my wife's dd, and I don't want it to be much louder, but I do want it to be faster for my weekend spirited driving.

It seems that the videos posted above has aftermarket exhaust as well as the dp. I could be wrong, but I am just not aware of a tts being so loud from Audi, I apologies if I am wrong.

Looking forward to hearing any input of a dp added to a TT with factory exhaust. I too am looking to go with the apr 3" dp, and stg II flash. Just bought the car a few weeks ago, so its stock, but flashing it this week.

I have a 2009 2.0 quattro S-line with an APR Stage 1 flash. I swapped the OEM cat-back exhaust and rear valance for those from the TTS because I much preferred the quad pipe look. The OEM TTS exhaust is marginally (if any) louder than the one I replaced and is not at all intrusive.

After a while I also wanted to a little more go and installed a Miltek downpipe and re-flashed to APR Stage 2. While relatively quiet at tip in, at moderate to WOT that downpipe literally roars.

Now maybe that would be great for some and probaly fine for the track, but most of my driving is in the city and am not looking for unwanted attention from the gendarmes. I am also not a kid who wants the loudest exhaust possible. To make matters worse, the volume was so unnerving that I couldn't even get a seat-of-the-pants feel for whether I'd gotten any performance gains.

Bottom line - I removed that downpipe after less than a week.

IMHO if you install that on your wife's car, I would also put a divorce lawyer on retainer.

i have just the APR downpipe installed on my 2012 TTRS and I wouldn't say it is a lot louder. I would say it is slightly louder and a bit throatier with a few more pops and burbles thrown in. Certainly not anything that is obnoxious...it is still fairly tame at city/neighborhood speeds but growls when you really get on it.

How much louder with APR downpipe?

i have just the APR downpipe installed on my 2012 TTRS and I wouldn't say it is a lot louder. I would say it is slightly louder and a bit throatier with a few more pops and burbles thrown in. Certainly not anything that is obnoxious...it is still fairly tame at city/neighborhood speeds but growls when you really get on it.

I'm interested in the 3"downpipe for a different reason: EGT's. When it's >90F my car is noticably down on power. My understanding is that a less restrictive exhaust, especially adjacent to the turbo, is the best way to prevent the ecu from making a richer fuel mix to cool things down.

How much louder with APR downpipe?

I'm interested in the 3"downpipe for a different reason: EGT's. When it's >90F my car is noticably down on power. My understanding is that a less restrictive exhaust, especially adjacent to the turbo, is the best way to prevent the ecu from making a richer fuel mix to cool things down.

I just put a 42 draft designs turbo back on my 2012 tts. It has hfc and res and sounds great at low rpms but anything over 4000 just is way to loud. 7000 redline shifts under high boost are like shotguns going off. Me I don't like it, but my wife does? I must be getting old. I'm thinking about putting old stock cat back on with the hfc to tame it down again. I think if I do I will keep the flap open on other side stock exhaust.

Just my .02. I got the DP after stage 1. I do not think there is any noticeable difference from stock to stage 1. The DP did add some deeper grawl, but not a bunch of high pitched noise. I do not find the sound to be any more intrusive than stock. While cursing, it is just as tame as before. When I put it in sport mode and push it hard, it sounds like a full on race car. I really like it. It is the best of both worlds to me. Going stage 2 did not really change anything in the sound except volume rises faster as the RPM's rise faster.

On cold startup, it has a deep rumble, but no snap. Early in the AM, I worried, but my neighbors (VERY quiet neighborhood) stated they cannot hear it inside. Under warm idle (about 20 seconds later) and mild acceleration no impact. In part throttle, it's a nice rasp, no drone. Under WOT, it is an Atlas missile.

I think APR posted a file on YouTube.

"The Spartans do not ask how MANY enemy there are. The Spartans merely enquire WHERE they are."

Ok I took off the 42dd cat back part and put stock back on and opened the flapper valve. I think this is the perfect sound now for my tts. So I'm running the 42 dd hfc and res with the stock exhaust with stage 2 plus apr tune.

William, we need to get together and do some more pulls so we can see real world the difference in stock vs stg 2. Need to get on the highway though so we can do some longer pulls though. shoot me a text or an email.